package _23strategy;

public abstract class Duck {

	public Duck() {

	}

	public abstract void display();//显示鸭子信息

	public void quack() {
		System.out.println("鸭子嘎嘎叫~~");
	}

	public void swim() {
		System.out.println("鸭子会游泳~~");
	}

	public void fly() {
		System.out.println("鸭子会飞翔~~~");
	}

}
